pickerel weed vs Pontederia cordata

pickerel weed and Pontederia cordata both are nouns.

Word	Noun	Adjective	Verb	Adverb
pickerel weed	Yes	No	No	No
Pontederia cordata	Yes	No	No	No

As nouns, pickerel weed and Pontederia cordata are synonyms defined as:

pickerel weed and Pontederia cordata: American plant having spikes of blue flowers and growing in shallow water of streams and ponds

Other synonyms of pickerel weed include pickerelweed, wampee.

pickerel weed (noun)	Pontederia cordata (noun)
American plant having spikes of blue flowers and growing in shallow water of streams and ponds	American plant having spikes of blue flowers and growing in shallow water of streams and ponds